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Makovka662 [10]
3 years ago
7

The probability that a person catches a cold during the cold and flu season is 0.4. assume that 10 people are chosen at random.

what is the probability that exactly four of them will catch a cold
Mathematics
1 answer:
Oksana_A [137]3 years ago
7 0
From the information given;
P(cold) = 0.4
P(no cold) = 1-0.4 = 0.6

The number of ways of selecting 4 from 10 = 10C4 = 210

Probability that the 4 selected with catch a cold:

P(4 will catch cold) = (10C4)*P(cold)^4*P(no cold)^6 =  210*0.4^4*0.6^6 = 0.2508

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Calculate the frequency of a wave with a speed of 130 m/s and a wavelength of 2.5
denis23 [38]

Answer:

  52 Hz

Step-by-step explanation:

We can divide the speed by the wavelength to find the number of waves propagated in one second:

  (130 m/s)/(2.5 m/wave) = 52 waves/s

The SI unit of frequency is the Hertz, equal to one cycle per second.

The frequency of this wave is 52 Hz.

_____

<em>Additional comment</em>

The use of the unit Hz to signify frequency was adopted in 1933, but did not replace the unit "cycles per second" (CPS) until a number of years later.

3 0
2 years ago
What is the slope of a line that is perpendicular to the line y= -1/2x +5?
spin [16.1K]
The answer is:

B. -1/2

Explanation:
The equation is in y= mx + b form, which means that m= slope and b= y-intercept. You can see that the slope is -1/2.


7 0
3 years ago
Question is in the picture, please help me out!!
Grace [21]

The arithmetic sequences are as follow:

<h3>What is Arithmetic Sequence?</h3>

An arithmetic sequence in algebra is a sequence of numbers where the difference between every two consecutive terms is the same.

1) t(n) = 5n + 4

t(1) = 9, t(2) = 14, t(3) = 19

So,

9,14,19,...

d= 14-9 = 5

d= 19-14 =5

Hence, it is an AP

2) 1, 2, 4, 8 , 16

Hence, it is not an AP

3) 3, 6, 9 ,...

It is an AP

4)It is given that it is an AP

5) tn =  2*3^n

 t1= 6, t2= 18, t3= 54

So, 6, 18, 54,...

Hence, it is not an AP

6) 3 , 1, 1/3,...

It is not an AP

7) t(n+1)= 6*t(n)

t(1) = -1

t(2)=-6

t(3)= -36

Hence, it is not an AP

8) -3, 1, 5, 9

Hence, it is an AP.

9) 1, 4, 9,...

Hence, it not an AP

10) 2,1,0,1,2,...

It is not an AP

11) t(n)= -2n-5

t(1)= -7, t(2)= -9, t(3)= -11

Hence, it is an AP

12) tn= (1/2)^n

 t1= 1/2, t2= 1/4, t3= 1/8

It is not an AP

Learn more about AP here:

brainly.com/question/24873057

#SPJ1

6 0
2 years ago
The Ferrari Testarossa and the Porsche 911 Turbo are 400 miles apart and headed straight toward each other. The Ferrari is going
ryzh [129]

Answer:

1.6 hours

Step by step explanation;

1 hour would make them only 150 miles apart, 60% of 120 and 60% of 130 added together is 150 mph, so 1.6 hours

Hope this helps :)

5 0
3 years ago
Please help me with the problems circled in green thank you in advance
Zigmanuir [339]
1) 6yds 2)2000mL 3)10.46km 4)10560ft 8)6300 meters
6 0
3 years ago
Read 2 more answers
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